Military promotion points: One U.N. investigation found that soldiers from the 173rd Brigade Combat Team of the United States were among those killed in 2017.
Three were killed while training and another five were killed when they tried to return to base after the Iraqi government withdrew.
The Pentagon said the soldiers died from a lack of oxygen while on duty.
One soldier died in Iraq after being hit by a roadside bomb, the Pentagon said.
The other three died from complications from post-traumatic stress disorder, the Defense Department said.
Another three soldiers were wounded by roadside bombs in Afghanistan, and the U.K. said it found two in Iraq.
An Army spokesman said three U.P. soldiers in Iraq were killed by an improvised explosive device.
An Iraqi military spokesman said one U.F.O. soldier was killed in an explosion in Baghdad.